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35763b1ee7
This simplification happens at 2 places : - using the nsw attribute when the shl / mul is used by a sign test - when the shl / mul is compared for (in)equality to zero git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177856 91177308-0d34-0410-b5e6-96231b3b80d8
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